Mercedes-Benz 2008 M-Class Operator's Manual page 427

Practical hints
What to do if ...
Display message
Tire Pressure Monitor
Inoperative
Tire Pressure Monitor
Inoperative
No Wheel Sensors
Tire Pressure Monitor
Wheel Sensor Missing
Tire Pressure Monitor
Currently Unavailable
426
Possible cause/consequence
The TPMS or Advanced TPMS* is
malfunctioning.
There are wheels without appropriate wheel
sensors mounted (e.g. winter tires).
Vehicles with Advanced TPMS*:
One or more sensors are defect (e.g.
battery is empty).
The respective tire is indicated by
instead of the tire inflation pressure in the
multifunction display.
Vehicles with Advanced TPMS*:
One or more wheels without appropriate
wheel sensors mounted (e.g. spare tire).
The respective tire is indicated by
instead of the tire inflation pressure in the
multifunction display.
The TPMS or Advanced TPMS* is unable to
monitor the tire pressure due to a nearby
radio interference source.
Possible solution
Have the TPMS or Advanced TPMS* checked by an
authorized Mercedes-Benz Light Truck Center.
Have the TPMS or Advanced TPMS* checked by an
authorized Mercedes-Benz Light Truck Center.
Have the wheel sensors installed by an authorized
Mercedes-Benz Light Truck Center.
Have the Advanced TPMS* checked by an autho-
rized Mercedes-Benz Light Truck Center.
Have the wheel sensors installed by an authorized
- - - Mercedes-Benz Light Truck Center.
Have the Advanced TPMS* checked by an autho-
rized Mercedes-Benz Light Truck Center.
Have the wheel sensors installed by an authorized
- - - Mercedes-Benz Light Truck Center.
As soon as the causes of the malfunction have been
removed, the TPMS or Advanced TPMS* automati-
cally becomes active again after a few minutes
driving.